================================================================== BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in do_replace net/ipv4/netfilter/ip_tables.c:1129 [inline] BUG: KASAN: slab-out-of-bounds in do_ipt_set_ctl+0xd57/0x1240 net/ipv4/netfilter/ip_tables.c:1631 Read of size 4888 at addr ffff88802b2d5a60 by task syz-executor.4/9663 CPU: 0 PID: 9663 Comm: syz-executor.4 Not tainted 6.9.0-rc3-next-20240409-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] do_replace net/ipv4/netfilter/ip_tables.c:1129 [inline] do_ipt_set_ctl+0xd57/0x1240 net/ipv4/netfilter/ip_tables.c:1631 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 do_sock_setsockopt+0x3af/0x720 net/socket.c:2311 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7f879907de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8799e210c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f87991abf80 RCX: 00007f879907de69 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00007f87990ca47a R08: 00000000000000ca R09: 0000000000000000 R10: 0000000020000640 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f87991abf80 R15: 00007fff8b64a6e8 Allocated by task 9663: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4078 [inline] __kmalloc_noprof+0x200/0x400 mm/slub.c:4091 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:775 [inline] sockopt_alloc_buf kernel/bpf/cgroup.c:1776 [inline] __cgroup_bpf_run_filter_setsockopt+0x2e9/0x1050 kernel/bpf/cgroup.c:1817 do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a The buggy address belongs to the object at ffff88802b2d5a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 96 bytes inside of allocated 202-byte region [ffff88802b2d5a00, ffff88802b2d5aca) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b2d4 head: order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff80000000040(head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000040 ffff888015041b40 ffffea000092e380 dead000000000003 raw: 0000000000000000 0000000080100010 00000001ffffefff 0000000000000000 head: 00fff80000000040 ffff888015041b40 ffffea000092e380 dead000000000003 head: 0000000000000000 0000000080100010 00000001ffffefff 0000000000000000 head: 00fff80000000001 ffffea0000acb501 ffffea0000acb548 00000000ffffffff head: 0000000200000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1800152135 (swapper/0), ts 1, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2259 allocate_slab+0x5a/0x2e0 mm/slub.c:2422 new_slab mm/slub.c:2475 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624 __slab_alloc+0x58/0xa0 mm/slub.c:3714 __slab_alloc_node mm/slub.c:3767 [inline] slab_alloc_node mm/slub.c:3945 [inline] __do_kmalloc_node mm/slub.c:4077 [inline] kmalloc_node_track_caller_noprof+0x286/0x440 mm/slub.c:4098 __do_krealloc mm/slab_common.c:1190 [inline] krealloc_noprof+0x7d/0x120 mm/slab_common.c:1223 add_sysfs_param+0xca/0x7f0 kernel/params.c:654 kernel_add_sysfs_param+0xb4/0x130 kernel/params.c:817 param_sysfs_builtin+0x16e/0x1f0 kernel/params.c:856 param_sysfs_builtin_init+0x31/0x40 kernel/params.c:990 do_one_initcall+0x248/0x880 init/main.c:1263 do_initcall_level+0x157/0x210 init/main.c:1325 do_initcalls+0x3f/0x80 init/main.c:1341 page_owner free stack trace missing Memory state around the buggy address: ffff88802b2d5980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802b2d5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802b2d5a80: 00 00 00 00 00 00 00 00 00 02 fc fc fc fc fc fc ^ ffff88802b2d5b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802b2d5b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================